Safety appliance for elevators.



C. R. ARNOTT.

SAFETY APPLIANCE FOR ELEVATORS.

APPLlcAUoN man JUNE 271915.

1,176,189. Patented Mar. 21, 1916.

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SAFETY APPLIANCE FOR ELEVATORS.

APPLICATION FILED IuIIE 2.1915.

1,176,189. Patented Mar. 21,1916.

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APPL Y :LED .1915. 1,176,189. Pate Mar. 21, 1916.

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l) JlL CECIL IR. ARNOTT, OF SPOKANE, WASHINGTON.

SAFETY APPLIANCE FOR ELEVATORS.

Specification of Letters Patent. l Patntgd play. 21, 1916.

Application led .Tune 2, 1915. Serial No. 31,753.

To all 'whom it may concern.'

Be it known that I, Cron. R. AnNoT'r, a citi-zen of the United States, residing at Spokane, in the county of Spokane and State of Washington, have invented certain new and useful Improvements in Safety Appliances for Elevators, of which the following is a specification.

, My invention relates to improvements'in safety appliances for elevators, adapted to prevent the operation of the starting mechanism therefor, when one or more of the doors of the elevator shaft is partly vor wholly open.

An important object of the invention is to provide apparatus of the above mentioned character, which is simple in construction, inexpensive to manufacture, strong and durable.

`Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanyingl drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout. the same, Figure l is a side elevation of apparatus embodying the invention, Fig. 2 is a similar view taken at a right angle to Fig. 1, Fig. 3 is a diagrammaticview of the riders and associated elements, Fig. 4 is a horizontal sectional view taken on line 4-4 of Fig. 1, F1g. 5 is a perspective view of the rider, and, Fig. 6 is a horizontal sectional View through one corner post takenabove a guide member.

In the drawings, wherein for the purpose of illustrationis shown a preferred embodiment of my invention, the numeral 5 designates corner posts of an elevator shaft, which are vertically arranged and held stationary by any suitable means. An elevator (not shown) is mounted to move vertically within the'shaft, as is customary. The elevator shaft may be of any height and have two or more landings 6, as shown. The opposite sides ofthe elevator` shaft,

A at each landing, are formed open, and receive vertically sliding doors or gates 7, whilethe other sides of the-elevator shaft are closed, as shown at 7. These doors or gates 7 are slidably mounted between strips 8, secured to the posts 5 as shown in Fig. 4.

Arranged preferably exteriorlv of each door or gate 7 is a rider designated as a wholeby the numeral 8. This rider comprises a horizontal arm 9, carrying an inverted U-shaped head 10, which straddles the upper end of the door or gate 7, but has no attachment thereto.V Connected with the horizontalV arm 9 is a diagonal brace.

arm 11, extending downwardly therebelow. The arms 9 and 11 @are rigidly connected with a pair of vertical longitudinally movablerods 12, which are rigidly connected at their ends, as shown at 12. These rods 12 are mounted to slide in guides 13 (see Fig. (i), rigidly attached to the posts 5. It is thus apparent that the rider will move up with its door or gate 7, when the door or gate is elevated, and the rider may be elevated while Vthe door or gate remains in the closed position. j

There are two pairs of the vertical rods 12, as is obvious, and means are provided to connect them, whereby when one pair is elevated or lowered a corresponding movement of the other pair is effected. This means comprises cables 14 or the like. Each cable let is attached to one horizontal arm 9 and extends upwardly and passes about pulleysl, and downwardly beneath a pulley 16. The cable then extends upwardly for connection with one diagonal brace arm 11 in the other rider, in the uppermost pair. It is obvious that when the rcd 12, to the left, in Fig. 3, is elevated, the outer cable 11 is moved downwardly, in the direction of the arrow, and pulls the rod 12 to the right upwardly, while the upward movement of the rod 12'to the right pulls the inner cable 1l downwardly, as the other rod is elevated. The pulleys 15 and 1G are suitably connected with the frame work of the elevator shaft or other supports.

While I prefer to use pairs of rods 12, on account of the strength and lightness of the construct-ion, yet it is obvious that satisfactory results are obtainable by using a single rod in place of each pair,v and such change is considered as within thel vspirit of the invention.

The starting mechanism of the elevator comprises a grooved wheel 17, rotatably mounted upon a stationary shaft 18, ar-

ranged adjacent the lowermost landing 6. This grooved pulley is engaged by the usual cable or rope 19,- eXtending longitudinally through the shaft, with one portion thereof extending through the elevator. The grooved pulley 18 has a toothed wheel or pinion 20 secured to one side thereof and preferably cast integral therewith. This pinion is adapted to be engaged by a bolt or lock member, mounted to reciprocate within a tubular casing 22, rigidly mounted upon a stationary bracket 23. This bolt has connection with a retractile coil spring 23, surrounding it, and having its lower end connected with the lower end of the tubular casing. The function of this spring is to move the bolt downwardly into engagement with the pinion, when it is released.

Pivotally connected with the upper end -of the bolt 21 is a vertically swinging lever 24,. pivoted between its ends as shown at 25. The outer end of the lever 24 is provided with a slot 26, receiving a pivot element or pin 27, which is rigidly secured to the lower end of one pair of vertically movable rods 12.

The operation of the apparatus is as follows: When the elevator is stopped at the desired landing, the door or gate 7 at such landing, is raised to the open position. When'this door is elevated the corresponding rider 8 moves up` whereby the rod or pairs of rods 12 attached thereto is elevated. This movement of the pair of rods 12, carries the other rider or riders connected therewith upwardly, and the other pair of rods 12 and riders secured thereto are also .simultaneously elevated, as hereinabove eX- plained. It is obvious that when any one of the doors or gates is elevated, both pairs of rods 12 and their riders are raised. Upon the upward movement of these pairs of rods 12, the outer end of the lever 24 is swung upwardly and its inner end downwardly, whereby'the spring 23 moves the bolt 21 downwardly into engagement with the pinion 20 and the starting mechanism is locked against movement. It will then be impossible to start the elevator until all of the gates are returned to the lower closed position.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described the invention, I claim:

1. Safety apparatus for elevators, comprising a plurality of sets of riders adapted to Contact with vertically movable doors to move therewith and with relation thereto, means connecting the riders in one set with the riders in the other set so that they move together in the same direction upon the movement of one rider in one direction, and means operated upon the movement of the riders in one direction to lock the elevator starting mechanism against movement.

2. Safety apparatus for elevators, comprising a plurality of verticallyY movable rods adapted to be arranged upon opposite sides of the elevator shaft, means connecting the rods whereby they move together in the same direction, a plurality of riders con- .nected with each rod and adapted to contactwith vertically movable doors ofthe elevator shaft, and means operated upon the upward movement of one rodV to lock the elevator starting mechanism against movement.

3. Safety apparatus forelevators, comprising a plurality of vertically movable rods to be arranged upon opposite sides of the elevator shafts; sets of upper and lower pulleys arranged near the upper ends ofthe rods; cables connecting the upper ends of the rods, each cable having one end connected with the adjacent Arod and passed lupwardly about the upper set of pulleys and downwardly beneath the lower ulley adjacent the other rod and upwarc ly for connection with the other rod; a plurality of riders carriedby each rod and adapted to contact with vertically movable doors of the elevator shaft; and means operated upon the upward movement of one rod to lock the elevator starting means against movement.

4f. Safetyy apparatus for elevators, com- I elevator shaft, a swinging leverA pivotally connected with one vertically movable rod, a pinion for controlling the operation of the elevator starting mechanism, and a Vbolt movable into and out of engagement with the pinion to control its rotation and connected with the lever. Y

5. Safety apparatus for elevators, comprising a plurality of vertically movable rods adapted to be arranged upon different sides of the elevator shaft, pulleys arranged Y near the upper ends of the rods, cables connecting the upper ends of the rods and engaging the pulleys in a manner whereby when either rod is elevated the other rod moves up with it, a plurality of riders car-l ried by each rod and adapted to contact with vertically movable ,doors of the ele- Within the sleeve to move the bolt downvator shaft, a swinging lever pivotally con Wardly. 10 nected with one vertically movable rod, a In testimony whereof I alx my signature pinion for Controlling the operation of the in presence of tWo Witnesses.

elevator starting mechanism, a bolt connect- CECIL R. ARNOTT. ed with the lever and adapted to engage and Witnesses:

disengage the pinion, a sleeve Within which A. N. DOLPHIN,

the bolt operates, and a spring arranged GLENN E. CUNNINGHAM.

copies of this patent may be obtained for tive cents each, by addressing the Commissioner o! Patents, Washington, I). C. 

